Internal Medicine Providers in Muskego, WI
Browse 6 Internal Medicine providers listed in NPPES with a practice address in Muskego, Wisconsin.
How Muskego compares with the U.S.
6 active clinicians in Internal Medicine list a practice address in Muskego, WI in the NPI registry.
With fewer than 10 clinicians, rates per 100,000 residents are not reliable enough to compare.
Too few clinicians in Internal Medicine in Muskego are listed in the CMS Medicare file to report Medicare assignment or telehealth shares.
These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.
Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com · Methodology
Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026.
Dr. James M. Chapman , MD
Internal Medicine
Dr. Daniel Cheng , MD
Internal Medicine
Dr. Daniel J Riordan , DO
Internal Medicine
Dr. Stephen J Dufresne , MD
Internal Medicine
Dr. Steven J Mamerow , MD
Internal Medicine
Dr. Mary Ann Sonsalla , MD
Internal Medicine
Frequently Asked Questions about Internal Medicine in Muskego
Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Wisconsin licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.
This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.
Other Specialties in Muskego
Internal Medicine Providers in Other Wisconsin Cities
Cities with the most listed practitioners first.